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WARNING:  READ SAFE OPERATION RULES AND MANUAL CAREFULLY

 

INSTALLATION OPERATION and MAINTENANCE MANUAL 
 
100% Outside Air Cooling/Dehumidifying Units 
High Efficiency Split Systems

 

 
 
 

CONTENTS PAGE 

 

Product Description

................................................

3-5 

Unit Location

...........................................................

5, 6 

Pre-Installation and Code Requirements

..................

Blower Performance

...................................................

Condensing Unit Dimensions

................................

8, 9 

Air Handler Unit Dimensions

.............................

10, 11 

Electrical Data

...........................................................

12 

Low Voltage Wiring

..................................................

13 

Typical Wiring Diagram

.......................................

14,15 

Piping/Diagram

...................................................

 16-18 

Leak Testing and Evaluation

...................................

17 

Preparing Equipment for Operation/Start-Up

.........

19 

Capacity Control

.......................................................

20 

Sequence of Operation

.............................................

20 

Service

..................................................................

21-24 

Check, Test and Start Form

.....................................

25 

 

 
 
 

APPLICATION 

RCA split cooling/dehumidifying systems are designed to 
cool and dehumidify 100% outside air for those 
applications requiring make up air cooling. These units 
should not be used as the primary source of cooling or 
heating the conditioned space. 

 

Cond. Unit 

Air Handler 

Nominal 

 

Model 

Model 

MBH 

EER* 

RCA051 

V/HCA051 

48.3 13.6 

RCA061 

V/HCA071 

59.2 13.6 

RCA071 

V/HCA081 

73.3 11.4 

RCA101 

V/HCA101 

110.5 12.1 

RCA141 

V/HCA141 

142.3 11.5 

RCA171 

V/HCA201 

187.9 14.7 

RCA201 

V/HCA201 

217.0 14.6 

RCA271 

V/HCA271 

263.2 13.9 

RCA361 

V/HCA361 

311.6 13.3 

RCA421 

V/HCA421 

395.5 12.5 

 

@ 95°F DB, 78°F WB Air Entering Evaporator and Condenser.

 

Table 1 

Safe Operation Rules 

Please take a few minutes to read our instructions before 
you install and use your air conditioner. This will help you 
obtain the full value from your air conditioner. It will also 
help you avoid any needless service costs that result from 
causes we cannot control and cannot cover in our 
warranty. 

Follow these rules and the instructions carefully. Failure to 
do so could cause a malfunction of the air conditioner, 
resulting in injury, death and/or property damage. 

Check local codes and utility standards. The installation 
must comply with their rules. 

Always shut off electric power before making unit 
connections or removing any panels. 
During installation or servicing, be extremely careful to 
avoid injury. Components may have sharp edges or 
protrusions which can cut you. Tubing and compressor 
contain high pressure refrigerant—they must not be 
exposed to high temperature or be punctured. 

Form # 0527N-0598  Rev. C  (0410)

 

Summary of Contents for RCA051

Page 1: ...3 11 4 RCA101 V HCA101 110 5 12 1 RCA141 V HCA141 142 3 11 5 RCA171 V HCA201 187 9 14 7 RCA201 V HCA201 217 0 14 6 RCA271 V HCA271 263 2 13 9 RCA361 V HCA361 311 6 13 3 RCA421 V HCA421 395 5 12 5 95...

Page 2: ...s of the colors used Operational failure of this unit for any reason including but not limited to mechanical or electrical failure of devices internal or external to the unit loss of fuel such as natu...

Page 3: ...rator at the air handling unit as possible The liquid line solenoid is factory installed on units with hot gas reheat Hot Gas Bypass Circuit Provided for capacity control by maintaining a constant suc...

Page 4: ...rive sheaves connected to a 1725 rpm motor The blower has sealed ball bearings that do not require lubrication Blower Motor The blower motor operates at 1725 rpm The motor has sealed ball bearings tha...

Page 5: ...lectric heater may be required Air Handler Model Heater kW Available V HCA051 1 9 V HCA071 1 12 V HCA141 1 25 V HCA201 5 39 V HCA271 5 50 V HCA361 10 60 Minimum 80 CFM per kW Table 4 UNIT LOCATION Con...

Page 6: ...unit support at mounting location Install proper electrical power service and disconnect switch Provide drainage as necessary Maintain minimum clearance for airflow into and out of unit Inspection of...

Page 7: ...1 030 0 5 1 090 0 6 1 160 0 7 1 500 680 0 3 780 0 3 870 0 4 960 0 5 1 040 0 6 1 100 0 7 1 100 650 0 2 770 0 3 860 0 3 940 0 4 1 020 0 5 1 090 0 6 1 160 0 6 VCA HCA 1 400 700 0 3 800 0 3 880 0 4 960 0...

Page 8: ...8 DIMENSIONS...

Page 9: ...9 DIMENSIONS Continued...

Page 10: ...10 DIMENSIONS...

Page 11: ...11 DIMENSIONS Continued...

Page 12: ...LA MCA Max Fuse Size 208 230 1 60 4 4 6 15 208 230 3 60 2 0 3 15 460 3 60 1 0 2 15 1 2 380 415 3 50 1 5 2 15 208 230 1 60 5 4 7 15 208 230 3 60 2 8 4 15 460 3 60 1 4 2 15 3 4 380 415 3 50 2 1 3 15 208...

Page 13: ...conjunction with the control for Hot Gas Reheat A remote system switch such as a timeclock or interlock may be used to energized the controls Once it is established that supply voltage is within the u...

Page 14: ...14 TYPICAL FIELD WIRING DIAGRAM...

Page 15: ...r handler is installed at a higher elevation than the compressor provide a vertical loop in the suction line adjacent to the air handler to a point at least to the top of the evaporator coil Do not in...

Page 16: ...ic acid also decomposes the compressor lubrication oil causing sludge Great care should be exercised in keeping moisture out of the refrigeration system when installing tubing because an extremely sma...

Page 17: ...17 FIELD WIRING DIAGRAM...

Page 18: ...ove 70 75 degrees F Reduce the evaporator load lower entering airflow until the suction pressure lowers to the point at which bypass is desired 115 PSIG If the hot gas bypass was de energized to stop...

Page 19: ...er is applied to the high pressure control and the adjustable time delay The time delay begins when power is applied to the timer After the time delay closes the circuit continues through the low pres...

Page 20: ...er in a commercial split system New system must be evacuated as outlined on page 14 to remove air and non condensables in the system The liquid line drier will trap any moisture left in the system Sys...

Page 21: ...d inlet clearances and for possible air re circulation Check high side equalized pressure reading with equivalent outdoor temperature Check calibration of switch Check discharge and liquid line pressu...

Page 22: ...on of low ambient head pressure control Suction Pressure Too Low Refrigerant undercharge Blower running backwards Loose blower pulley or belts Defective or improperly adjusted expansion valve Dirty fi...

Page 23: ...ilter Check superheat and adjust TXV check bulb Check compressor for proper operation See above high discharge pressure Check external static pressure Supply Air Temperature Too Low Airflow is too low...

Page 24: ......

Page 25: ...__________ WB _________ Design CFM ________________ Outdoor Air Inlet Temperature _____________ DB__________ WB _________ Outdoor Fan Discharge Air Temperature__________ DB ________ Suction Pressure _...

Page 26: ...26 NOTES...

Page 27: ...27 NOTES...

Page 28: ...28...

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